.elevator {
    width: 44px;
    background: #e9e6e6;
    position: fixed;
    right: 50%;
    top: 50%;
    z-index: 999;
    margin-right: 640px;
    margin-top: -266.5px;
    padding-bottom: 4px;
}

.elevator ul li {
    width: 28px;
    height: 29px;
    line-height: 14px;
    font-size: 12px;
    background: #655f61;
    padding: 4px;
    color: #fff;
    margin: 4px 4px 0 4px;
    text-align: center;
    cursor: pointer;
}

.elevator ul li:first-child {
    line-height: 29px;
    background: #ff1a66;
}

.elevator ul li:last-child {
    line-height: 29px;
    background: #acacac;
}

.elevator ul li:hover {
    background: #f69;
}